content: /*
   * Copyright 2017 David Karnok
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  package hu.akarnokd.reactive4javaflow;
  
  import hu.akarnokd.reactive4javaflow.impl.VH;
  import org.openjdk.jmh.annotations.*;
  
  import java.lang.invoke.*;
  import java.util.concurrent.TimeUnit;
  
  /**
   * Example benchmark. Run from command line as
   * <br>
   * gradle jmh -Pjmh="VolatilePerf"
   */
  @BenchmarkMode(Mode.Throughput)
  @Warmup(iterations = 5)
  @Measurement(iterations = 5, time = 5, timeUnit = TimeUnit.SECONDS)
  @OutputTimeUnit(TimeUnit.SECONDS)
  @Fork(value = 1)
  @State(Scope.Thread)
  public class VolatilePerf {
  
      Object ref;
      static final VarHandle REF = VH.find(MethodHandles.lookup(), VolatilePerf.class, "ref", Object.class);
  
  
      int[] value = new int[512];
      static final VarHandle VALUE = MethodHandles.arrayElementVarHandle(int[].class);
  
      @Benchmark
      public void setRelease() {
          REF.setRelease(this, this);
      }
  
      @Benchmark
      public void setVolatile() {
          REF.setVolatile(this, this);
      }
  
      @Benchmark
      public void getAndSet() {
          REF.getAndSet(this, this);
      }
  
      @Benchmark
      public void getAndAdd() {
          VALUE.getAndAdd(value, 256, 0);
      }
  
      @Benchmark
      public void releaseGetAndAdd() {
          REF.setRelease(this, this);
          VALUE.getAndAdd(value, 256, 0);
      }
  }